Results 261 to 270 of about 2,485,196 (302)

Induced Resistance of Cotton Seedlings to Mites

Science, 1984
Mite populations grew more rapidly on new growth of cotton seedlings that had never been exposed to mites than on new growth of plants whose cotyledons had been previously exposed to them. Experiments in which a second mite introduction on the exposed plants involved a different mite species produced this same result.
R, Karban, J R, Carey
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Expression of Resistance to CMV Migration in Pepper Seedlings

Journal of Phytopathology, 1994
AbstractPrevious studies have shown that the partially resistant genotypes of pepper (Capsicum annuumL.), ‘Milord’ and ‘Vania’ are able to localize CMV infection in some shoots of the plants when inoculated at an adult stage. We have observed that the virus migration is restricted to the inoculated cotyledons when young seedlings of these genotypes are
Dogimont, Catherine, Daubèze, A.M., Palloix, Alain   +2 more
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SCREENING FOR TBV-RESISTANCE IN SEEDLING POPULATIONS OF TULIPA L.

Acta Horticulturae, 1996
Tulip breaking virus (TBV) threatens bulb and flower production of tulips seriously. Breeding for resistance as a tool to prevent this disease resulted already in a screening test at clonal level and different levels of resistance were detected. Clonal tests are performed under greenhouse conditions after inoculation by viruliferous aphids.
Straathof, Th.P., Eikelboom, W., van Tuyl, J.M., Peters, D.   +3 more
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Resistance to Inanition in Grass Seedlings

Nature, 1948
SOME years ago I found that grass seedlings which were in competition with other grasses older than themselves were able to remain alive for several months, although growth, in the sense of increase in size, could not take place1. In these experiments the competition of the older plants operated by the removal of mineral nutrients from the soil ...
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Fate of Fluorodifen in Resistant Peanut Seedlings

Weed Science, 1971
Rapid absorption and limited acropetal movement of 14C from p-nitrophenyl-α,α,α-trifluoro-2-nitro-p-tolyl ether (hereafter referred to as fluorodifen) labeled with 14C at either the 1 position of the p-nitrophenyl ring (fluorodifen-1′-14C) or the trifluoromethyl carbon (fluorodifen-14CF3) were observed in peanut (Arachis hypogaea L., var.
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Assessing resistance to leafroll in potato seedlings

Potato Research, 1973
A method is described for assessing the resistance to leafroll of large numbers of potato clones, exposed to conditions of intense natural infection. Scoring for resistance can be accomplished with reasonable accuracy and the method enables the adjustment of data to accommodate annual variations in the natural spread of infection.
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Germination and appressorium formation of wheat leaf rust on susceptible, partially resistant and resistant wheat seedlings and on seedlings of other Gramineae

Netherlands Journal of Plant Pathology, 1989
Germination and appressorium formation of wheat leaf rust urediospores were studied in two experiments. No consistent differences could be detected between 11 genotypes of wheat (Triticum aestivum), two of barley, one ofTriticum dicoccum, one ofT. dicoccoides, one ofT. boeoticum and one ofAegilops squarrosa.
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Resistance to water uptake by conifer seedlings

2010
Water availability for uptake by tree seedlings is determined both by the soil water potential in relation to seedling needle water potential and by the resistance to flow of water through the soil, root and stem, to the needles. This study was designed to focus principally on water uptake resistances.
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RESISTANCE OF THE RED CURRANT SEEDLINGS TO REDHEAD APHID

Vestnik of the Russian agricultural science, 1970
Aphid (Cryptomyzus ribis L., syn. Capitophorus ribis L.) is one of the dangerous pests for red currants. The aim of the research was to study the level of resistance of hybrid red currant seedlings to this pest and select seedlings combining high aphid resistance with other valuable traits.
O. V. Kalinina, O. D. Golyaeva
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Specificity of Resistance to Aphanomyces euteiches in Seedling Alfalfa

Plant Disease, 1990
(...)Resistance to A.e. in experimental populations was not effective against disease caused by Phytophthora megasperma f. medicaginis, and resistance to P. m. f. medicaginis was similarly ineffective against A.e. In another experiment, plants resistant to isolates of A.e. recovered from alfalfa were resistant to isolates from peas.
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